A Study to Investigate IGT-303 in Healthy Volunteers and Participants With Chronic Kidney Disease

Inclusion Criteria: * Participant 18-75 years of age, inclusive, at Screening; * Able to understand the key components of the study as described in the written informed consent document, and willing and able to provide written informed consent; * Body mass index (BMI) within the range of 18.5 to 40 kg/m2 at Screening; * Have a diagnosis of chronic kidney disease stage 2-3b, resulting from Type 2 diabetic nephropathy; * UACR \>30 mg/g, \<5000 mg/g at Screening and Day -1; * If taking antihypertensive and/or antidiabetic medication, doses of medications must be stable for at least 90 days prior to Screening; * Participants assigned male at birth (AMAB) will be either sterile or agree to use an approved method of contraception from Screening until at least 5 half-lives plus 90 days after the last dose of study drug, or do not engage in sexual relations which carry a risk of pregnancy (does include abstinence), and agree to refrain from sperm donation and in vitro fertilization until 5 half-lives plus 90 days after the last dose of the study drug; Participants assigned female at birth (AFAB) must be of non-childbearing potential or agree to use two highly effective methods of conception from Screening until at least 5 half-lives plus 30 days after the last dose of study drug or do not engage in sexual relations which carry a risk of pregnancy (does include abstinence), and agree to refrain from egg donation and in vitro fertilization until 5 half-lives plus 30 days after the las…